Lath.



J. H. LEIST.

LATE.

APPLICATION FILED FEB. 27, 1912. 1,061,889. Patented May 13, 1913.

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JACOBH. LEIST, OF PORTLAND, OREGON.

LATH.

Specification of Letters Patent.

Patented May 13,1913.

Application filed February 27, 1912. Serial No. 680,270.

T0 all whom it may concern Be it known that I, JACOB H. LErs'r, a

citizen of the United States, residing in the city of Portland, county of Multnomah, and State of Oregon, have invented certain new and useful Improvements in Lath, of which the following is a specification.

My invention relates to lath, and more particularly to metallic lath, and by this term I mean sheets of perforated metal, wire netting, or other metallic structure adapted to be used as a foundation for receiving and holding a coating of plaster, of whatever material.

I am aware that there are numerous forms or designs of sheet metal lath now in use, and that this kind of lath has many advantages and is being largely used in builditig and wall construction. The lath is first secured to the studs or beams and one or more coats of plaster, cementor other material is applied directly to the face thereof, being forced through the perforations or openings therein and protruding from the opposite or back side thereof in the form of fingers. These portions or fingers of the plaster in most cases protrude from a half or threequarters of an inch to an inch or more through the perforations or openings in the lath and rest one upon the other at the back` side of the lath, and are easily broken off. A'great waste of the material is thus caused by its being worked through the openings or perforations ofthe lath without being in any way formed into a mass or sheet upon `the back of the lath. If this material thus worked through the lath were formed 1nto` a coherent mass or sheet, it would, of course, serve a good purpose, but hanging as 1t does 1n protrudingportlons or fingers, with spaces therebetween, and being easily broken olf, it constitutes a Waste.

I have conceived the idea of providin an inexpensive backing for this kind of ath, a backing or mold sheet of paper which can be attached directly thereto for the purpose of molding the material into a sheet or solid mass on the back side of the lath, and also servin to limit the amount of material which is allowed to be worked through the perforations or openings in the lath asit is applied thereto. This backing or mold sheet is preferabl of pa er, although a mold sheet forme offabric of any suitable and inexpensive kind might be used. It is applied directly to the back side of the lath before the plaster or other coating material is applied to the face thereof. I preferably use coal tar, rooting pitch, asphalt, or other like material for applying the backing sheet to the lath.

The invention will be readily understood from the following description, taken with the foregoing, and with the accompanying sheet of drawings illustrating one embodiment thereof, and in which- Figure 1 is a face View showing, from left to right, a section of paper backing, a section of the metallic lath consisting of a sheet of expanded metal, and a section of the lath with backing and plaster applied thereto; Fig. 2 is a sectional view through Fig. 1,' taken on line 2-2 thereof; Fig. 3 is a sectional view through Fig. l, taken on line 3-3 thereof, and enlarged for purpose of illustration.

Referring now to the drawings, 1 designates a paper backing, here shown to be a plain sheet, 2 a section of metallic lath withoutthe plaster applied thereto and with the paper backing attached to the back side thereof, and 3 a section of the lath with the paper backing and with a coating of plaster applied to the face thereof. This paper backing is preferably secured to the lath with the use of tar, pitch, asphalt, or other suitable material which can be quickly and readily applied to the lath before the paper is placed thereupon, although it would be possible to treat the paper and apply it to the lath. thereto, the plaster canV be applied to the face of the lath in the usual manner.

The metallic lath yin common use and shown in the drawing is such in its form and As soon as the paper 1s secured design that when a plain sheet of paper is applied ilatwise thereto, there are left openings between the strands ofthe lath and the paper suiicient to permit the material to form intoa solid mass or sheet as it is applied thereto in a moist condition. metallic lath shown is that well known as expanded metal, formed by slitting the metal and drawin or forcing` out the strands to open the s its-and turn the strands at an angle to theplane of the. metal,y t-he joints between the strands forming portions projecting beyond the strands .and only these portions engaging the paper, as clearly shown in the drawing. The same result of openings between the body of the .lat-h and the paper may be secured with lath of other forms having projecting port-ions. The paper also, serves to hold the material firmly for the reason that said material adheres to the paper through the erforations in the lath very tanaciously. f corrugated paper is used, of course, there is more open space between the paper and the lath, and a greater amount of thepmaterial will be formed in these openings between the paper and the lath. This will be readily linderstood."

It is suggested that the building paper which is usually used in the ,construction of outside walls, might be applied to the back side of the lat-h and thus serve the double purpose of keeping the building warm, if it be an outside wall, and of forming the plastering material vwhich works through the lath into a coherent mass or sheet which sheet secured on one Side thereof by means of anadhesive, substantially as and for the purpose described.

2. A new article of manufacture consistv ing of metallic lath and a backing mold sheet secured on one side thereof by means of an adhesive applied to the lath, substantially as and for the purpose described.

y3. A new article of manufacture consisting of metallic lath having projecting portions and a backing mold sheet secured on one side thereof by means of an adhesive between said sheet and the projecting portions of the lath, said sheet being spaced away from the lath between the projecting portions to provide spaces for passage of plastic material between the lath and sheet\for molding a solid body of plastic material against the mold sheet, substantially as and for the purpose set forth. 5

4. A new article of manufacture consisting of expanded metal lath having it-s strands turned at an angle to the plane of the metal, and a paper backing mold sheet secured on one side thereof byV means of an adhesive between said sheet and the projecting strand joints of the lath, said sheet being spaced away from the lath strands between the projecting joints to provide spaces between the sheet and the lath strands for the passage of plastic Vmaterial between the lathstrands and paper to mold a solid body of plastic material against the sheet, substantially as and for the purpose set forth.

In witness whereof, I have hereunto set my hand at Portland, Oregon, this 19 day of February, 1912.

JACOB H. LEIST.

In presence of- J. C. STRENG, Cms. H. KOPF. 

